Monthly Archives: December 2014

Hello good people of the world! This post is about Statistical Process Control (SPC), and what false positives, or type I errors, mean for SPC results.

A false positive or type I error may be simply described as an error where a correlation is believed to be seen, although it does not actually exist. In statistics, this is called falsely rejecting the null hypothesis. Details can be found, for instance, on Wikipedia.